A nurse is assisting with teaching a class about herbal supplements that can decrease nausea. Which of the following supplements should the nurse include?

Ginger is a well-recognized herbal supplement used to decrease nausea and vomiting. It has been studied for use in pregnancy-related nausea, chemotherapy-induced nausea, and postoperative nausea. The active components in ginger, including gingerols and shogaols, are thought to act on serotonin receptors in the gastrointestinal tract and may also have central antiemetic effects. It is considered a relatively safe complementary therapy when used in appropriate amounts. Cranberry is used primarily to prevent urinary tract infections by inhibiting bacterial adhesion to the bladder wall; it has no established antiemetic properties. Echinacea is an herbal supplement used to support immune function and is commonly taken to reduce the duration or severity of upper respiratory infections such as the common cold; it does not have a role in managing nausea. Garlic has cardiovascular benefits, including mild antihypertensive and antilipemic effects, and also has some antimicrobial properties, but it is not indicated for nausea management. Among the options, ginger is the only supplement with evidence supporting its use as an antiemetic, making it the correct answer for this teaching scenario.